<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        p{
            color: red!important;
        }
        .hello{
            font-size: 30px;
            color: green;
        }
        #world{
            color: blue;
        }
        
        div{
            color: #f00;
        }
    </style>
    <link rel="stylesheet" href="css/hello.css">
</head>
<body>
    <p class="hello" id="world" style="color: pink;">1024程序员节，节日快乐！</p>
    <div>Happy everyday.</div>
</body>
</html>